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Preparation of GOQDs Modified SA Composite Hybrid Membrane

Authors： YAO Lulu, TANG Lin, WAN Yunyun, CUI Peng

Units： School of Chemistry and Chemical Engineering, Hefei University of Technology, Anhui Province Key Laboratory of Controllable Chemical Reaction & Materials Chemical Engineering, Hefei 230009, China

KeyWords： graphene oxide quantum dots; sodium?alginate; composite hybrid membrane; pervaporation; isopropanol; dehydration

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(3):89-97

Abstract：

In this paper, self-made graphene oxide quantum dots (GOQDs) were mixed with sodium alginate (SA) polymer homogeneously and the mixture was used to made composite hybrid membrane with polyporous nylon membrane as substrate. The influence to the structure, morphology, surface hydrophilic, swelling degree and pervaporation properties of GOQDs content in the membrane has been discussed in this paper. It can be seen that, SA-GOQD composite hybrid membranes showed excellent pervaporation dehydration properties of isopropanol aqueous. The optimized GOQDs content in membrane was 2 wt%. Here pervaporation flux and separation factor were 1130±51g/(m2⋅h) and 2241±73, the pervaporation separation index (PSI) was 2.53×106 g/(m2⋅h) at 50 oC and 10 wt% water in the feed. These resulted in an increase over the SA control membrane of 1.41-fold, 5.90-fold and more than 8-flod. The flux and separation factor showed increased with temperature elevated at same time. While flux can be improved obviously by higher water content in the feed. It’s not liable to produce the water molecules penetration effect with too much GOQDs, which usually happened as excessive GO accumulation.

Funds：

自然科学基金项目（21476055），中央高校基本科研业务费专项资金资助（JZ2019HGBZ0169）

AuthorIntro：

姚路路（1980-），男，安徽淮南人，博士，高级实验师，合肥工业大学，研究方向为膜分离技术

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